Tharumenthiran Nadarajah

US Patent:

60695552, May 30, 2000

Filed:

May 6, 1998

Appl. No.:

9/073476

Inventors:

David G. Skitek - Raytown MO
Nighat I. Abidi - Kansas City MO
Tharumenthiran Nadarajah - Kansas City MO
Mark E. Brown - Lake Quivira KS

International Classification:

G08B 500

US Classification:

34028614

Abstract:

A facility access system includes a system microprocessor and input and output subsystems. The input subsystem can include switching devices connected in a parallel configuration for actuating the system microprocessor in a sequencing mode of operation. Input devices are also disclosed which produce input signals corresponding to particular memory storage locations for accessing directional and other information in a look-up mode of operation. The directional and other information is output to text display, graphical display and audio output devices. A user's computer can be linked to the system microprocessor for downloading information therefrom. An emergency subsystem provides emergency exit information, dials out to summon assistance and includes a backup power source.